Ignore hardware mute switch during video playback in attachment approval view.

// FREEBIE

Signal/src/Signal-Bridging-Header.h

@@ -26,6 +26,7 @@
 #import "UIFont+OWS.h"
 #import "UIUtil.h"
 #import "UIView+OWS.h"
+#import "ViewControllerUtils.h"
 #import <JSQSystemSoundPlayer.h>
 #import <PureLayout/PureLayout.h>
 #import <SignalServiceKit/Contact.h>

Signal/src/ViewControllers/AttachmentApprovalViewController.swift

@@ -51,6 +51,18 @@ class AttachmentApprovalViewController: UIViewController {
         createViews()
     }
 
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+
+        ViewControllerUtils.setAudioIgnoresHardwareMuteSwitch(true)
+    }
+
+    override func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+
+        ViewControllerUtils.setAudioIgnoresHardwareMuteSwitch(false)
+    }
+
     // MARK: - Create Views
 
     private func createViews() {